The nasal cavity of the bearded seal: An effective and robust organ for retaining body heat and water
Permanent lenke
https://hdl.handle.net/10037/35031Dato
2024-09-10Type
Journal articleTidsskriftartikkel
Peer reviewed
Forfatter
Cheon, Hyejeong Lee; Kizilova, Nataliya; Flekkøy, Eirik Grude; Mason, Matthew J.; Folkow, Lars; Kjelstrup, SigneSammendrag
We report the effects of varying physiological and other properties on the heat and water exchange in the
maxilloturbinate structure (MT) of the bearded seal (Erignathus barbatus or Eb) in realistic environments, using
a computational fluid dynamics (CFD) model. We find that the water retention in percent is very high (about
90 %) and relatively unaffected by either cold (−30 ◦C) or warm (10 ◦C) conditions. The retention of heat
is also high, around 80 % . Based on a consideration of entropy production by the maxilloturbinate system,
we show that anatomical and physiological properties of the seal provide good conditions for heat and water
exchange at the mucus lining in the seal’s nasal cavity. At normal values of tidal volume and maxilloturbinate
(MT) length, the air temperature in the MT reaches the body temperature before the air has left the MT
channels. This confers a safety factor which is expected to be helpful in exercise, when ventilation increases.
Forlag
ElsevierSitering
Cheon, Kizilova, Flekkøy, Mason, Folkow, Kjelstrup. The nasal cavity of the bearded seal: An effective and robust organ for retaining body heat and water. Journal of Theoretical Biology. 2024;595:1-12Metadata
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Copyright 2024 The Author(s)